|Publication number||US7239922 B1|
|Application number||US 10/700,110|
|Publication date||Jul 3, 2007|
|Filing date||Nov 3, 2003|
|Priority date||Nov 3, 2003|
|Also published as||US7769471|
|Publication number||10700110, 700110, US 7239922 B1, US 7239922B1, US-B1-7239922, US7239922 B1, US7239922B1|
|Inventors||Jerome J. Boogaard, Robert W. Lucas, John W. Swanson, Sergey N. Varivoda|
|Original Assignee||Advanced Neuromodulation Systems, Inc.|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (17), Referenced by (24), Classifications (6), Legal Events (4)|
|External Links: USPTO, USPTO Assignment, Espacenet|
Cables that are designed to be implanted in a patient, typically for pain management or other neurological stimulation, are generally fitted with a series of ring contacts. A ring contact, which circumscribes the cable, makes contact with the desired locations inside the patient's body, regardless of the orientation of the cable.
The presently used technique for attaching the ring connectors is somewhat cumbersome. Typically, each individual wire is stripped and a ring fixture is crimped onto it. This operation requires a fair amount of manual labor, requiring fine coordination, and is, therefore, quite expensive.
In a first separate aspect the present invention is a method of manufacturing a biological electrical stimulus cable. The method begins with a cable portion having a plurality of first conductive wires set into a length of insulative material. A portion of the insulative material is removed from the surface creating an exposed first wire surface. Then, a second conductive wire is connected to the exposed first wire surface and a conductive ring is placed about the cable portion and electrically connected to the second conductive wire.
In a second separate aspect the present invention is a biological electrical stimulus cable assembly. A cable portion includes a plurality of first conductive wires set into a length of insulative material having a surface. An aperture is defined through the insulative material from the surface of the length of insulative material to one of the conductive wires, thereby creating an exposed first wire surface. A second conductive wire is electrically connected to the exposed first wire surface and a conductive ring that is placed about the cable portion is electrically connected to the second conductive wire.
The foregoing and other objectives, features and advantages of the invention will be more readily understood upon consideration of the following detailed description of the invention, taken in conjunction with the accompanying drawings.
A laser is used to ablate an aperture 15 (
In an alternative preferred embodiment a conductive ring 18 is constructed of conductive material directly on the cable portion 10. In an additional alternative preferred embodiment, a partial ring, for example one that extends through three-quarters of a circle is used. In one preferred embodiment cable portion 10 has a diameter of 500 microns, wires 12 are 100 microns thick, wire 16 is 75 microns thick and ring 18 is 50 microns thick and 3,000 microns wide.
Although a frequency multiplied ND:YAG laser is the preferred device for removing insulative material 14, the pulse lengths available from this type of laser are typically not lengthy enough to facilitate laser welding. As a result, for the welding portion of the above described task, the preferred tool is an ND:YAG laser that is not frequency multiplied or a CO2 laser.
To help hold each ring 18 in place, the cable portion 10 may be over molded after the rings 18 have been attached. In this operation the cable portion 10 is encased in a polymer resin, which does not cover the outer surfaces of rings 18. In this manner rings 18 may be affirmatively retained and not permitted to slide longitudinally.
In some embodiments, ring 18 is placed radially over wire 16, while in a different preferred embodiment, wire 16 abuts ring 18 longitudinally.
The terms and expressions which have been employed in the foregoing specification are used as terms of description and not of limitation, and there is no intention, in the use of such terms and expressions, of excluding equivalents of the features shown and described or portions thereof, it being recognized that the scope of the invention is defined and limited only by the claims which follow.
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|Cooperative Classification||A61N1/056, A61N1/0551|
|European Classification||A61N1/05L, A61N1/05N|
|Nov 3, 2003||AS||Assignment|
Owner name: MICROHELIX, INC., OREGON
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BOOGAARD, JEROME J.;LUCAS, ROBERT W.;SWANSON, JOHN W.;AND OTHERS;REEL/FRAME:014671/0740
Effective date: 20031029
|May 6, 2004||AS||Assignment|
Owner name: ADVANCED NEUROMODULATION SYSTEMS, INC., TEXAS
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MICROHELIX, INC.;REEL/FRAME:014604/0809
Effective date: 20040421
|Oct 28, 2010||FPAY||Fee payment|
Year of fee payment: 4
|Jan 5, 2015||FPAY||Fee payment|
Year of fee payment: 8